Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas voltas teve um número de grade de 7?
 ###Tabelas: CREATE TABLE list_of_coaches_by_club (list_of_coaches_by_club_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Nationality VARCHAR, Club VARCHAR, From INT, Until VARCHAR) CREATE TABLE deficit_spending (deficit_spending_id AUTO_INCREMENT PRIMARY KEY, End of Fiscal Year INT, Gross Debt in $Billions undeflated Treas. INT, as % of GDP Low-High VARCHAR, Debt Held By Public ($Billions) INT, as % of GDP (Treas/MW, OMB or OMB/MW) INT, GDP $Billions OMB/BEA est.=MW.com VARCHAR) CREATE TABLE race (race_id AUTO_INCREMENT PRIMARY KEY, Driver VARCHAR, Constructor VARCHAR, Laps INT, Time/Retired VARCHAR, Grid INT) CREATE TABLE members_of_the_board (members_of_the_board_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, President VARCHAR, Vice President VARCHAR, Gen.-Secretary VARCHAR, Treasurer VARCHAR) CREATE TABLE team_career_passing_records (team_career_passing_records_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Completions INT, Attempts INT, Completion % VARCHAR, Yards INT, Touchdowns INT, Interceptions INT, QB Rating VARCHAR)  
SELECT SUM Laps FROM race WHERE Grid = 7